CN206049108U - A kind of length-adjustable chalk clamping device - Google Patents

Abstract

The utility model discloses a kind of length-adjustable chalk clamping device, including shell body, inner sleeve and top cover, it is characterised in that：The shell body is followed successively by the first shell body, second housing body and the 3rd shell body from top to bottom, and the inner sleeve is followed successively by the first inner sleeve, the second inner sleeve and the 3rd inner sleeve from top to bottom, and the top cover is arranged on the first shell body.As a result of above-mentioned technical proposal, this utility model is conveniently write, clean hygiene, adjustable length, does not result in the waste of chalk, and can effectively reduce chalk powder for the damage of teacher's hand skin.

Description

A kind of length-adjustable chalk clamping device

Technical field

This utility model is related to a kind of educational aid, and in particular to a kind of length-adjustable chalk clamping device.

Background technology

Chalk is a kind of higher educational aid of frequency used in education activities, but traditional method of clamping is teacher's use Handss are clamped, and are easily infected with chalk powder on hand at which, are caused different degrees of damage to the skin of its hand, and not enough totally defend It is raw, puzzlement is caused to numerous teachers.

The content of the invention

The purpose of this utility model is to provide one kind and writes convenience, clean hygiene and can effectively prevent teacher's hand injury Length-adjustable chalk clamping device.

For achieving the above object, the technical solution adopted in the utility model is：A kind of length-adjustable chalk clamping device, Including shell body, inner sleeve and top cover, the shell body is followed successively by outside the first shell body, second housing body and the 3rd from top to bottom Housing, the inner sleeve are followed successively by the first inner sleeve, the second inner sleeve and the 3rd inner sleeve from top to bottom, and the top cover is arranged on On first shell body；

First shell body, second housing body and the 3rd shell body are linked together by diameter difference, in the first shell Body, the inwall of second housing body are provided with two spacing holes；

The outer wall bottom of first inner sleeve, the second inner sleeve and the 3rd inner sleeve is respectively provided with an elastic spacing block, The elastic spacing block can be engaged with spacing hole；

The upper inside wall of first inner sleeve, the second inner sleeve and the 3rd inner sleeve is respectively provided with a circle elastic clamping block.

As a result of above-mentioned technical proposal, this utility model is conveniently write, clean hygiene, and adjustable length is not resulted in The waste of chalk, and chalk powder can be effectively reduced for the damage of teacher's hand skin.

Description of the drawings

Fig. 1 is this practical operation principle schematic diagram.

Fig. 2 is this utility model elastic clamping block distribution schematic diagram.

Fig. 3 is this utility model spacing hole distribution schematic diagram.

In figure：1st, shell body, 2, inner sleeve, 3, top cover, the 4, first shell body, 5, second housing body, the 6, the 3rd shell body, 7th, the first inner sleeve, the 8, second inner sleeve, the 9, the 3rd inner sleeve, 10, spacing hole, 11, elastic spacing block, 12, elastic clamping block.

Specific embodiment

As Figure 1-3, the technical solution adopted in the utility model is：A kind of length-adjustable chalk clamping device, bag Shell body 1, inner sleeve 2 and top cover 3 are included, the shell body 1 is followed successively by the first shell body 4, second housing body 5 and from top to bottom Three shell bodies 6, the inner sleeve 2 are followed successively by the first inner sleeve 7, the second inner sleeve 8 and the 3rd inner sleeve 9 from top to bottom, described Top cover 3 is arranged on the first shell body 4；

First shell body 4, second housing body 5 and the 3rd shell body 6 are linked together by diameter difference, outside first Housing 3, the inwall of second housing body 4 are provided with two spacing holes 10；

The outer wall bottom of first inner sleeve 7, the second inner sleeve 8 and the 3rd inner sleeve 9 is respectively provided with an elastic spacing Block 11, the elastic spacing block 11 can be engaged with spacing hole 10；

The upper inside wall of first inner sleeve 7, the second inner sleeve 8 and the 3rd inner sleeve 9 is respectively provided with a circle elastic clamping Block 12.

By arrangement above, this utility model when in use, top cover 3 is opened, from top by chalk according to taper end it is advanced, The laggard order of butt end is put in inner sleeve 2, chalk is clamped by elastic clamping block 12, in use for some time, By the cooperation between elastic spacing block 11 and spacing hole 10, the regulation to 2 length of inner sleeve is realized, while passing through diameter difference reality The now regulation to 1 length of shell body, so as to realize the regulation of the device entire length, to adapt to the change of chalk length.

Above content is the detailed description made to this utility model with reference to specific preferred implementation, it is impossible to assert this The specific embodiment of utility model is confined to these explanations.For the ordinary skill people of this utility model art For member, without departing from the concept of the premise utility, some simple deduction or replace can also be made, should be all considered as Belong to the scope of patent protection of claims determination that this utility model is submitted to.

Claims (1)

1. a kind of length-adjustable chalk clamping device, including shell body, inner sleeve and top cover, it is characterised in that：The shell Body is followed successively by the first shell body, second housing body and the 3rd shell body from top to bottom, and the inner sleeve is followed successively by from top to bottom One inner sleeve, the second inner sleeve and the 3rd inner sleeve, the top cover are arranged on the first shell body；

First shell body, second housing body and the 3rd shell body are linked together by diameter difference, the first shell body, The inwall of two shell bodies is provided with two spacing holes；

The outer wall bottom of first inner sleeve, the second inner sleeve and the 3rd inner sleeve is respectively provided with an elastic spacing block, described Elastic spacing block can be engaged with spacing hole；

The upper inside wall of first inner sleeve, the second inner sleeve and the 3rd inner sleeve is respectively provided with a circle elastic clamping block.